Calculus Examples

$x^{e x}$

Step 1

Use the properties of logarithms to simplify the differentiation.

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Step 1.1

Rewrite $x^{e x}$ as $e^{\ln (x^{e x})}$ .

$\frac{d}{d x} [e^{\ln (x^{e x})}]$

Step 1.2

Expand $\ln (x^{e x})$ by moving $e x$ outside the logarithm.

$\frac{d}{d x} [e^{e x \ln (x)}]$

Step 2

Differentiate using the chain rule, which states that $\frac{d}{d x} [f (g (x))]$ is $f' (g (x)) g' (x)$ where $f (x) = e^{x}$ and $g (x) = e x \ln (x)$ .

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Step 2.1

To apply the Chain Rule, set $u$ as $e x \ln (x)$ .

$\frac{d}{d u} [e^{u}] \frac{d}{d x} [e x \ln (x)]$

Step 2.2

Differentiate using the Exponential Rule which states that $\frac{d}{d u} [a^{u}]$ is $a^{u} \ln (a)$ where $a$ = $e$ .

$e^{u} \frac{d}{d x} [e x \ln (x)]$

Step 2.3

Replace all occurrences of $u$ with $e x \ln (x)$ .

$e^{e x \ln (x)} \frac{d}{d x} [e x \ln (x)]$

Step 3

Since $e$ is constant with respect to $x$ , the derivative of $e x \ln (x)$ with respect to $x$ is $e \frac{d}{d x} [x \ln (x)]$ .

$e^{e x \ln (x)} (e \frac{d}{d x} [x \ln (x)])$

Step 4

Multiply $e^{e x \ln (x)}$ by $e$ by adding the exponents.

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Step 4.1

Move $e$ .

$e e^{e x \ln (x)} \frac{d}{d x} [x \ln (x)]$

Step 4.2

Multiply $e$ by $e^{e x \ln (x)}$ .

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Step 4.2.1

Raise $e$ to the power of $1$ .

$e^{1} e^{e x \ln (x)} \frac{d}{d x} [x \ln (x)]$

Step 4.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$e^{1 + e x \ln (x)} \frac{d}{d x} [x \ln (x)]$

Step 5

Differentiate using the Product Rule which states that $\frac{d}{d x} [f (x) g (x)]$ is $f (x) \frac{d}{d x} [g (x)] + g (x) \frac{d}{d x} [f (x)]$ where $f (x) = x$ and $g (x) = \ln (x)$ .

$e^{1 + e x \ln (x)} (x \frac{d}{d x} [\ln (x)] + \ln (x) \frac{d}{d x} [x])$

Step 6

The derivative of $\ln (x)$ with respect to $x$ is $\frac{1}{x}$ .

$e^{1 + e x \ln (x)} (x \frac{1}{x} + \ln (x) \frac{d}{d x} [x])$

Step 7

Differentiate using the Power Rule.

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Step 7.1

Combine $x$ and $\frac{1}{x}$ .

$e^{1 + e x \ln (x)} (\frac{x}{x} + \ln (x) \frac{d}{d x} [x])$

Step 7.2

Cancel the common factor of $x$ .

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Step 7.2.1

Cancel the common factor.

$e^{1 + e x \ln (x)} (\frac{x}{x} + \ln (x) \frac{d}{d x} [x])$

Step 7.2.2

Rewrite the expression.

$e^{1 + e x \ln (x)} (1 + \ln (x) \frac{d}{d x} [x])$

Step 7.3

Differentiate using the Power Rule which states that $\frac{d}{d x} [x^{n}]$ is $n x^{n - 1}$ where $n = 1$ .

$e^{1 + e x \ln (x)} (1 + \ln (x) \cdot 1)$

Step 7.4

Multiply $\ln (x)$ by $1$ .

$e^{1 + e x \ln (x)} (1 + \ln (x))$